Motor for windshield cleaners



Dec. 29l 1925- 1,567,328

J. R. OISHEI MOTOR FOR WINDSHIELD CLEANERS Dec. 29, 19251 1,567,328

J. R. olsHEl MOTOR FOR WINDSHIELD CLEANERS Filed April 8, 1922 2 Sheets-Sheet Z 2,0 ZI/f5 Patented Dec. 29, 1925.

UNITED STATES JOHN B. OISHEI, 0F BUFFALO, NEW YGBK.

MOTOR FOB WINDBHIELD um.

application med prix a, im. sum no. 550,586.

To all whom it may concern:

Be it known that I, J oHN R. Olsner, citizcn of the United States, residing at Buffalo, in the county of Eric and State of New York, have invented a new and useful Improvement in Motors for Windshield Cleaners, of which the following is a speciication.

This invention relates to motors of the type adapted to operate automatic or power actuated cleaners for automobile Windshields and the like, in which the operating power` is derived from a suitable source, such for instance as the pneumatic pressure derived by connecting the device with the intake manifold of an automobile engine. The motel', however, is not restricted to use on automobile windshields but is adapted for actuating devices for cleaning street car and other windows or shields and for other uses.

One of the objects of the invention. is to produce a practical and desirable fluid pressure actuated motor which is strong and durable and which is not liable to get out of order. Other objects of the invention are to produce a motor in which the operating mechanism is com act and small, is not cumbersome or unsig tly in appearance, which when used with a windshield cleaner, will not obstruct the drivers view throu h the windshield and can be readily applic to the windshield; also to produce a motor having the above characteristics in which there is obtained a maximum effective area of movement of the vane of the pneumatic motor and a simplified means for actuating the reversing valves of said lnotor. Another object is to produce a motor wherein an effective seal 1s maintained between the vane and the inner walls of the pressure chamber in all movements of the vane.

For the purpose of disclosing the invention, one embodiment thereof is illustrated in the accompanying drawings, in which:

Fig. 1 is a side elevation of a motor embodymg the invention incorporated in a windshield cleaner in position on the windshield, a portion of which Windshield being shown in section.

Fig. 2 is a rear elevation thereof on a. reduced scale.

Fig. 3 is a plan View thereofon an enlarged scale.

Fig. 4 is a vertical sectional view of the vane chamber.

Fig. 5 is an enlarged horizontal section through one of the valve chambers on the line 5 5 of Fig. 7.

Fig. 6 is a rear elevation of the motor with the valve chamber cover broken away to show the valve operating mechanism.

Fig. 7 is a detail section on the line 7-7 of Fig. 8.

Fig. 8 is an enlarged sectional view of the motor on the line 8-8 of Fig. 2.

Fig. 9 is an enlarged detail section of the valve ports on the line 9-9 of Fig. 7.

Fig. 10 is an enlarged fragmentary sectional view of the vane.

Fi 11 is a side elevation thereof on a reduce scale2 showing the cleaner provided with two windshield wipers.

For the purpose of illustrating the invention, the motor is shown as incorporated in a windshield cleaner.

In the embodiment of the invention illustrated, the windshield 1, which is of ordinary construction and may be an automobile windshield or other window glass, is adapted to be cleaned by a wiper 2 arranged to be moved over the surface of the glass. This wiper may be of any usual or suitable construction and preferably consists of one or more strips o rubber or other material ada ted to bear against and clean the face of t e lass, and a metal channel piece in which t e rubber strips are confined. The wiper is preferably loosely pivoted between its ends at 3 on a carrying arm 4 which extends at one side of the windshield from a rock shaft 5 which is suitably mounted to rock so as to oscillate the carrying arm and wiper 2 in( an arc of a circle. The wiper can be pressed into wiping contact with the face of the shield by any suitable means, as for instance by making the carrying arm 4 resilient and adapted to press the wlper toward the shield, or by ot er suitable means.

In the construction shown the shaft 5 of the cleaner may entend throu h a hole in the top frame bar 6 of the shleld 1 into a motor casing 7 and is journaled in a bearing 8 in the latter. The casing may be suitably mounted on the shield at its inner side, for exam le,by Vbolts or screws 9 assin through tlie frame bar 6 of the win shiel The casing 7 supports and encloses the operating parts of t e motor for actuating the wiper.

The motor casing 7 is preferably provided with a pressure chamber 10 and a valve flll housing or chamber 11 located in rear of the poressure chamber, and comprises a main dy ortion and a removable top ortion 12 d) or otherwise secured on the bolte dy, portion to close the ends of the pressure chamber. The casing is preferably dividedy on a plane immediately above t e top of the shaft 5 and on the axial plane of the shaft at that portion of the casing 'embracing the shaft, to facilitate the assembling o the rounded corners, as shown in Fig. 8. The

Cmeans of axis of the rock shaft 5 is concentric with the parallel segmental walls of the pressure chamber and carries a vane 14 which is located, and ada ted to oscillate, in the pressure chamber. he vane at its upper end is provided midway of its two side edges with a shank 15 which passes through an opening in the rock shaft and is secured in position by a locking in 16, and a suitable slot 16 is formed in t e up r wall of the. chamber to permit the sh to oscillate with the vane. This vane 14 corresponds in shape with the cross sectional sha e of the chamber and is oscillated in t e chamber by plneumatic ressure applied alternately to t e faces o the vane, and 1s preferabl composed of airs of duplicate connecte plates or portions 17.

Improved means are rovided for packing the vane so that an e ective seal is maintained at all times between the vane and the chamber walls. These means preferably comprise cup shaped packing disks 18 secured between the plates 17 .and having inwardly bent edges 19. The shape of the vane and its chamber lends itself ,readily to the roper packing since it enables the use of the cup shaped leather packing disks 18 which fold over the edges of the vane at all points and there are no angles which are hard to pack or apt to leak. As best shown in Figs. 4 and 10, the 'folded over edges of one disk enga edges of the other disk, the edgesof the respective disks thereby supporting one another, preventing the ed being bent inwardly too .far and breakin the seal between the vane and the sides o the chamber. `The shank 15 is preferably provided with a peripheral groove 15l i'nto which the upper edges of the packing tightly fit, to prevent leaks through wear or any other cause at this point.

ge the folded over,

ntomas By the connecting of the vane with the rock shaft by means of the extending shank 15 and by making the inner and outer concentric segmental walls of the chamber parallel and mounting the rock shaft concentric with the inner wall, the full area of the vane is utilized as the effective area sub- 'ected to pneumatic pressure to osci ate lit 1n either direction. Furthermore, the mountin of the vane and rock shaft in the manner own and described permits a long stroke of thevane in its oscillating movement and erinits it to move to a point almost arallel with the underside of the cover or the pressure chamber almost into en agement therewith.

gneumatic pressure for operating the `vane and wiper may be provided by the intake manifold ofv an automobile engine and to this end a iexible tube 20 is connected to the intake manifold of'the automobile engine or other means for producing a suction or partial vacuum and ,is connected as b a nipple `21 with the motor casing 7. is nipple is connected by a suction passage 22 formed in the cover plate 12 and branchl passages 23 with two valve chambers 24 and 25, each of which in turn is connected by duplicate ports 26 and 27 with the pressure chamber 10 at4 the opposite faces of the vane, there bein one such port in each valve chamber. As 26 and 27 communicate with bridging recesses 28* in the cover, each recess connecting with the up er end of one of orts 26 or 27 and one sidxd ofthe pressure c amber. Preferably a valve 28 having a handle 29 is rovided 1n the assa 22 for controlling t e iow of air roug this passage to thereby start and stop and regulate the speed of the operation of the cleaner. Atmos heric pressure is alternatel admitted to t e faces of the vane and the aces of the vane alternately placed in communication with the suction passage 22 by suitable valves and valve actuating mechanism. To this end valve plugs 30 and 31 are located respectively in.' the valve chambers 24 and 25. Each'of these valve plugs has an upper face 82 adapted to engage and cover the corresponding end of branch passageway 23 in the cover plate and a head 32* whic closely lits the valve chamber and is adapted to cover and uncover the open end of port 26 or 27 in the valve chamber. Each of the valve plugs 30 and 31 is preferably ooved or cut away at one side as at 33 om the bottom to a point adjacent the head and provided with annular grooves -34 so that an' can be drawn up past the valve plugs and linto the ports 26, 27 when the valve plugs are seated to close branch pasown in Fig. 9, the ports' 23. When the valve plugs are in the y position shown in Fig. 7 with the valve plug 30 closing its corresponding passage 23 in d the cover and valve plug 31 in the lowered position, the left hand ce of the vane is connected with the suction passage 22 through the port 26 leading to the valve chamber and communication between the ri ht hand assa e 23 and the vane is closed w lile the right ace ofthe vane is opened to atmospheric pressure throu h the ve 33 of the valve plug 30. This position of the valve plugs causes the vane to swing to the left the vane chamber until the positions of the valve plugs are reversed to cause an opposite swinging movement of the vane.

For alternately reversing the position of the valves, a valve actuating rocker 35 is arranged in the outer chamber 11 preferably bein'g pivoted on a pin 36 screwed into the casing 7. This rocker is rovided with lateral arms 37 and 38 whic are res seated in recesses 37' and 38 in t e valve slugs and 31 and with a pair of ownwardly extending arms 39 and 40 having horizontally disposed ears 41 and 42 by which the rocker member is alternately rocked in opposite directions to operate the Valves. For alternately rocking the arm in o posite directions and in order that a uic or snap action may be im arted to t e arms whereby the valves will respectively snapped open and closed a spring operative sna evice is provided. This y device prefera ly include a U-shape upper arm 43, one leg of the U-shape arm being' pivoted on a pin 44 secured to a cross memer 45 screwed or otherwise secured to the casin as at 46. This upper arm 43 oscillates etween a pair of stops 47 and 48 preferably formed on the casing and which limit its movements. Ihe opposite and lower member 49 of the spring snap device is preferably of substantially the same construction as the upper member 43 and at its inner end the legs of the lower member 49 are likewise pivoted on the pins 36 and 44. The free ends of the arms 43 and 49 are connected to one another in suitable manner by means of a coiled spring 50er other tensioning device connected to the respective sna arms by suitable means. As shown, one eng of the spring ma be connected to an eye 51 secured to the e end of the lower member 49 of the toggle and the opposite end of the spring may connected to a pin 52 secured in the upper end of the u per sna arm 43 and preferably extending rom sai snap arm to be engaged by an actuating member. The mechanism for 4initiating movement of the snap arms preferably includes a late 53 mounted on the end of the rock sha t 5 and secured by means of a pin 54 and adapted to rock with said shaft and provided with shoulders 55 and 56 adapted to engage the projecting pin 52 on the upper snap arm to initiate movement of the spring tively arm device. 57 designate suitable washers or buffer on ears 41 and 42 of the rocker arms 39 and 40 against which the lower end of snap arm 49 contacts. The above arrangement of the mechanism for operating the valves provides a compact mechanism which is not readily gotten out of order and wgich at the same tlme will promptly open one valve and prom tl close the other one so that leaka o? t e valves during their opening an closing movement is prevented and full pressure on the oscillating vane is imparted throughout the length of its stroke in either direction. The o eration of the sna device may be observer in Fig. 7. With t e arms 43 and 49 in the position illusetrated in this figure, the vane will be swinging to the left and the late 53 moving 1n the direction of the otted arrow. As soon as then shoulder 55 of this plate engages the pin 52, it will move the upper arm 43 of the snap' device to the left until the upper end of the arm passes to the opposite side of the dead center and practically into engagement with the stop 49,

whereupon the coil spring 50 will snap the arm 43 against the stop 48 and likewise snap the arm 49 to the left against the ear 42 of the rocker member 35, rocking this member so that its arm 38 engaging the stem of the valve plug 31 causes the upper or inner end of this valve to seat and close the passage 23 in the left hand of the cover plate, opening the left face of the vane to the atmosphere. At the same time the valve plug 30 will unseat the upper end 32 of the valve plug thereby closing the right face of the vane to the atmosphere and opening it to the suction passage 22 through port 26 and passage 23 in the cover. This movement, however, of the snap. device will not have taken place until the vane has swung the limit of its stroke. As soon as the positions of the valve plugs are reversed. atmospheric pressure will be admitted to the left face of the vane and a vacuum or partial vacuum produced on the right side so that the vane will swing in the reverse direction.

In the construction shown in Flg. 11, there are shown two wipers 2a and 2' pivoted respectively to carrying arms 4a and 4" which are connected to and ocillated by a mechanically propelled rock shaft 5l which is mounted on the frame bar 6a of the windshield 1. 7"L designates the motor for actuating rock shaft 5, which motor may be of the construction hereinbeforc described or of other suitable construction. The wipers 2 and 2" may be 'of anysuitable construction, the wiper 2" preferably consisting of one or more .strips of rubber adapted to bear against the face of the windshield glass and a metal channel piece in which the rubber strip or strips are confined, and the inner wiper 2 preferably i nation of a the like.

The valve operating mechanism described herein gives a quick and positive movement to the valve plugs so that'the full pressure is exerted on the vane at lthe beginnin of its reverse swing as well as throughout its full swing in either direction.

By the mounting of the vane as heretofore described, the length of the stroke of the vane will be such that the operating arm 4 of the wi er may be moved to almost a horizontal position.l At the same time, due to the flexible connection 3 between the wiper 2 and its arm, when the arm has reached the upward limit of its stroke the wiper can assume a horizonal position in direct enga ment with the upper bar of the windshie d, as shown in Fi 2, so that the maximum area of the win hield will be wi ed clean.

As above described, the heads o the valve plugs closel lit the valve chambers and the upper ces of the valve plugs seat on the cover over the ends of branch assages 23. Suction in passages 22 anni) 23 will tend to hold the valve plug faces firinly seated on the ends of branch assages 23 which together with the closely fitting head of the `valve plug in the valve chamber effectively prevent leak e past the valve plug heads when the va ves are closed.

I claim as my invention:

1. In a lluid ressure motor adapted for o erating winds ield cleaners and the like, t e combination of a pressure chamber having inner and outer concentric, segmentalcircular walls of different radii, a vane arranged to oscillate in said chamber about the axis of said walls and having its inner and outer ends conforming in shape to and slidably contacting with lsaid walls, said vane including spaced substantially parallel plates and packing members having Flexible| edge portions extendin inwardly beyond said plates and towarcgls each other, the edges of one packing member engaging the c dges .of ,the opposite' packing member in line with the space between said plates, and means for causing said vane to oscillate in said chamber.

2. In a fluid pressure motor, the combipressure chamber having a pair of concentric2 segmental-circular walls of different radii, a vane arranged to oscillate in said chamber about the axis of said walls and having its inner and. outer ends con- `forming in shape to and slidably contacting with said walls, said vane. including a air of spaced substantially cup-sh ed pac ing members having flexible side e ge portions extending inwardly toward each other,

vthe edges of one packing member being Lacasse ada ted to engage the edges of the opposite pac ngr member in line with the space between vsaid members, whereby inward deection of the edges of one of said pack- .i members is resisted by the edges of the walls and having its inner and outer ends fittinflr slidably against said walls, said vane incluing a pair of spaced, substantially parallel plate members and resilient packing portions extending from the edges of said plate members inwardly towards each other, the edges of one of said packing portions coitacting with the ed es of the other packing portion in line wit the space between said plate members, and means for ctausing said vane to oscillate in said chamer. v

4. In a -fluid pressure motor having a ressure chamber, a vane adapted to oscilate from a fixed axis therein, a rock shaft, said vane including a pair of spaced parallel plates, a pair of packing members secured to said plates and having flexible side edge portions extending inwardly towards each other beyond said lates in the ace between said plates, an means exten in across a portion of the ace between sai plates and secured to said lates for connecting said vane to said roc shaft.

5. In a iluidpressure motor, the combination of a pressure chamber, a removable cover for said ressure chamber, a vane arranged to oscillate in said chamber, and

,means for simultaneously connecting one face of said vane with a source of fluid at one pressure and the other face of said vane with a source of Huid at a dillerent pressure, said means including a pair of valve chambers havin ports in communication with thefaces oir; said vane, passages in said cover communicating Awith one of said sources of iluid pressure and with said valve chambers, a valve plug in each valve chamber, each of said valve plugs having a portion adapted to seat against said cover to close the passages in said cover to said valve chambers, and means for alternately actuating said valve plugs to open and close said assa BS.

6. lin a uid pressure motor, the combinationI of a pressure chamber, a removable cover for saidressure chamber, a vane arranged to osci late in said chamber, and means for simultaneously connecting one face of said vane with a source of fluid at one pressure and the other face of said vane with a source of fluid at a different pressure, said means including a pair of valve chambers having ports in communication with the faces of said vane, passa es in said cover` communicating with one o said sources of fluid pressure and with said valve chambers, a valve plug in each valve chamber, each of.4 said valve plugs having a head adapted to close the port leading from its valve chamber to the vane face and t'o seat on the cover to close the passage to said valve chamber from said source of fluid pressure.

7. In a fluid pressure motor, the combination of a pressurechamber, a removable cover for said pressure chamber, a vane arranged to oseillate in said chamber, and means for simultaneously connecting one faire of said vane with a source of fluid at one pressure and the other face of said vane with a source of fluid at a different pressure, said means including a pair of valve chambers having orts in communication with `said faces o said vane, passages in said cover communicating with one of said sources of fluid pressure and with said valve chambers, a valve plugr in cach valve chamber, each of said valve plugs having a head adapted to close the port leading from its valve chamber to the vane and to seat on the cover to close the passage to said valve chamber from said source, of fluid pressure, and a recessed portion below said head for Jermitting the passage of air at atmospheric pressure through said valve chamber port when the passage' from said source of fluid pressure is closed.

8. In a fluid pressure motor, the combination of a vane and a pressure chamber, and means for applying pressure alternately to the faces of said vane for oscillating said vane, said means including a air of valve chambers and a valve lug 1n each chamber, ports for placing said)valve chambers in communication with a source of suction, a. port from one of said valve chambers to said pressure chamber at one face of said vane, a port from the other of said valvevchambers to said pressure chamber at the other face of said vane, each of said valve plugs having a head closely fitting its res ective valve chamber and a face adapte to cover and close one of said first named suction ports, whereby communication between each suction port and its respcctive value chamber is closed the seating of said valve plug face on sal port and the contacting of said valve plug head with the walls of said valve chamber.

9. In a fluid pressure motor having a pressure chamber and a vane adapted to oscillate from a fixed axis therein, a rock shaft, said vane including a par of spaced parallel plates, a pair of spaced packing members secured to said plates and having flexible' side edge portions extending inwardly towards each other beyond said lates, lthe side edges of one of said pack` lng members engaging the side edges of the other of said packing members substantially centrally of the space between said plates, and means extending across a portion of the space between said plates and scoured to said plates for connecting said vane to the rock shaft.

10. In a fluid pressure motor having a pressure oscillable in an arc of a circle, a segmental-circular pressure chamber therefor, a rock shaft on which said vane is mounted, and a pair of valves and fluid pressure connections for causin a preponderance of fluid pressure in t e piston chamber alternatel)- on the faces of the vane for causing oscillations of the vane. the combination of a pivoted rocker for shifting said valves, said rocker having an actuating arm, a spring connected at one end to said rocker actuating arm and extending across thevpivot of said rocker, the other end of said spring bein adapted to be moved first to one side anc then to the other side of the pivot of said rocker, and means fixed on a portion of said rock shaft for shifting said other end of the spring to oneside or the other of the pivotal axis of said rocker.

l1. In a fluid pressure motor having a pressure chamber and an oscillatory vane mounted on a rock shaft in said chamber for swinging in an arc of a circle therein, valves for causing a preponderance of fluid pressure in the pressure chamber'alternately on the faces of the vane for causing the vane to oseillate, a pivoted rocker for alternately operating said valves, a s ring aetuated sna action device for a ternately rocking said rocker in opposite directions, and a member fixed directly on the vane shaft of said vane for engaging and imparting initial movement in opposite directions t0 said snap device as said vane is oscillated.

JOHN R, OISHEI.

pressure, said means including a pair of valve chambers having ports in communication with the faces of said vane, passa es in said cover communicating with one o said sources of fluid pressure and with said valve chambers, a valve plug in each valve chamber, each of said valve plugs having a head adapted to close the port leading from its valve chamber to the vane face and t'o seat on the cover to close the passage to said valve 'chamber from said source of fluid pressure.

7. In a fluid pressure motor, the combination of a pressure chamber, a removable cover for said pressure chamber, a vane arranged to oscillate in said Chamber, and iiians for sinniltaneously connecting one face of said vane with a source of fluid at one pressure and the other face of said vane with a source of fluid at a different pressure, said means including a pair of valve chambers having ports in communication with said faces of said vane, passages in said cover communicating with one of said sources of fluid pressure and with said valve chambers, a valve plug in each valve chainber, each of said valve plugs having a head adapted to close the port leading from its valve chamber to the vane and to seat on the cover to close the passage to said valve chamber from said source. of fluid pressure, and a recessed portion below said head for permitting the passage of air at atmospheric pressure through said valve chamber port when the passage from said source of fluid pressure is closed.

8. In a fluid pressure motor, the combination of a vane and a pressure chamber, and means for applying pressure alternately to the faces of said vane for oscillating said vane, said means including a pair of valve chambers and a valve plug in each chamber, ports for placing said valve chainbers in communication with a source of suction, a port from one of said valve chambers to said pressure chamber at one Jface of said vane, a port from the other of said valve chambers to said pressure chamber at the other face of said vane, each of said valve plugs having a head closely fitting its respective valve chamber and a face adapted to cover and close one of said first named suction ports, whereby communication between cach suction port and its respective value chamber is closed by the seating of said valve plug face on said port and the contacting of said valve plug head with the Walls of said valve chamber.

9. In a fluid pressure motor having a pressure chamber and a vane adapted to oscillate from a fixed axis therein, a rock shaft, said vane including a par of spaced parallel plates, a pair of spaced packing members secured to said plates and having flexible side edge portions extending inwardly towards each other beyond said plates, the side edges of one of said packing members engaging the side edges of the other of said packing members substantially centrally of the space between said plates, and means extending across a portion of the space between said plaies and sccured to said plates for connecting said vane to the rock shaft.

l0. In a fluid pressure motor having a pressure oscillable in an are of a circle, a segmental-circular pressure chamber therefor, a rock shaft on which said vane is mounted. and a pair of valves and fiuid pressure connections for causing a preponderance of fluid pressure in the piston chamber alternately on the faces of the vane for causing oscillations of the vane. the combination of a pivoted rocker for shifting said valves, said rocker having an actuating arm, a spring connected at one end to said rocker actuating arm and extending across the pivot of said rocker, the other end of said spring being adapted to be moved first to one side and then to the other side of the pivot of said rocker, and means fixed on a portion of said rock shaft for shifting said other end of the spring to one side or the other of the pivotal axis of said rocker.

11. In a fluid pressure motor having a pressure chamber and an oscillatory vane mounted on a rock shaft in said chamber for swinging in an are of a circle therein, valves for causing a preponderance of fluid pressure in the pressure chamber alternate- 1y on the faces of the vane for causing the vane to oscillate, a pivoted rocker for alternately operating said valves, a s ring actuated snap action device for aternately rocking said rocker in opposite directions, and a member fixed directly on the vane shaft of said vane for engaging and imparting initial movement in opposite directions to said snap device as said vane is oscillated.

JOHN R. OISHEI,

Certificate of Correction. y p It is hereby certified that in Letters Patent No. 1,567,328, granted December 29,

1925, upon the application of John R. Oishei, of Buffalo, New

ork, for an improvement in Motors for Windshield Cleaners, errors appear in the (printed specification requiring correction as follows: Page 3, line 33,"for the wor include read includes; page 5, line 55, claim 8, for the Word value read calce; same page, line 62, claim 9, for the word par read pair, and line 76, claim l0, for the word pressure read cane; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the ease in the Patent Office.

l Signed and sealed this 26th day ofJanuary, A. D. 1926.

[SEAL] WM. A. KINNAN,

Acting Commissioner of Patents.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,567,328, granted December 29, 1925, upon the application of John R. Oishei, of Buffalo, New Urk, for an improve ment in Motors for VVindsheld Cleaners, errors appear in the rinted specification requiring correction as follows: Page 3, line 33,for the Worf include read includes; page 5, line 55, claim 8, for the Word value read valve; same page, line 62, claim 9, for the word par read pair, and line 76, claim 10, for the word pressure read www; and that the said Letters Patent should be read with these corrections therein that the same may conform to the reoord of the case in the Patent Ofoe.

y Signed and sealed this 26th day 0f January, A. D. 1926.

[SEAL] WM. A. KINNAN,

Acting 'ommz'sszomr of Patents. 

